Test suite: take into account that click-to-play is not required anymore for WebM videos in Tor Browser (refs: #14586).

Fix-committed: #12641

On current sid, virt-viewer eats a full CPU and doesn't do its job
when "unclutter -idle 0" is running. This change fixes that problem.

Change ACK'ed by anonym on tails-dev.

normalize_pot(): convert to extended regexp and avoid extreme quoting caused by shell double quotes (refs: #12641).

If the script fails at various points, these files would linger.

Comparing the new temporary POT files we generate with the temporary
POT files we generated last time (if ever, and if we did, for which
branch?) is not relevant; these POT files are only used for merging
into a new tails.pot and *that* one is relevant to diff against the
old tails.pot.

RTFM ♥

Otherwise we'll often converge to a state where we always get into the
"Real changes ..." case, which feels wrong; after a single run,
consecutive runs should always end up in the "Only header ...# case.

Ulrike Uhlig authored Sep 05, 2017 and anonym committed Sep 12, 2017

If only the line number has changed, don't update the potfile.
Make this reproducible :)

Fix-committed: #8281

Fix-committed: #13574, #13598

Fix-committed: #12687

Fix-committed: #12732, #11831, #12730

Fix-committed: #13463

LB_* variables has not been set yet, so we cannot use them.

This is a quick'n'dirty fixup on the fix for #14459 which already has
been merged.

Refs: #14459

Fix-committed: #14459

Fix-committed: #13441

Merge remote-tracking branch 'origin/bugfix/13439-reproducible-desktop-file-utils-mimeinfo.cache' into devel

Fix-committed: #13439